Harvesting specific plant metabolites from hairy root cultures using magnetized nanoparticles
使用磁化纳米颗粒从毛状根培养物中收获特定的植物代谢物
基本信息
- 批准号:9343261
- 负责人:
- 金额:$ 53.03万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2014
- 资助国家:美国
- 起止时间:2014-06-01 至 2019-03-31
- 项目状态:已结题
- 来源:
- 关键词:AffectAffinityAgonistAgreementAlkaloidsAntibodiesAntibody Binding SitesAntigensArtificial nanoparticlesBindingBinding SitesBioreactorsBiotechnologyCatharanthus roseusCell Culture TechniquesCell SurvivalCellsCharacteristicsChemicalsComplexDevelopmentDisadvantagedDisease OutbreaksEngineeringEquilibriumEstrogen Receptor betaEuropeExcisionExposure toFlavanonesFlavonoidsFluorescenceGermanyHarvestHumanImmobilizationIn VitroIndividualInternationalIsoflavonesLegal patentLicensingLicoriceLigand BindingMalignant NeoplasmsMonoclonal AntibodiesMutationNicotiana tabacumOligopeptidesPaclitaxelPeptidesPharmaceutical PreparationsPharmacologic SubstancePharmacologyPhasePhytoestrogensPlant RootsPlantsPostmenopauseProceduresProductionProteinsQuartzReaction TimeRiskSourceSterilitySurfaceSystemTaxoidsTechnologyTestingTherapeutic EffectTimeTissuesTobaccoTransgenic OrganismsTransgenic PlantsTubulinVaccinesVinca Alkaloidsanti-cancer therapeuticantigen bindingbasecell injurychemical synthesischemotherapycommercializationcrystallinityexperimental studyindexingkartocidmalignant breast neoplasmmutantnanoparticleneoplastic cellpolypeptideprotein aminoacid sequenceradioligandsolvent extractionsuccess
项目摘要
Abstract: Plant cell cultures are becoming a commercially valuable source of pharmaceuticals, particularly
those that are too complex for economical chemical synthesis. For example Phyton Biotech, in Germany, has
achieved great commercial success by generating taxoids for Paclitaxel production in sterile plant cell
bioreactors. However, the efficiency of these systems is limited by the loss in viability of the slow-growing plant
cells associated with conventional extraction procedures. The objective here is to develop a system that
allows plant cells to be harvested repeatedly for high value pharmaceutical products without losing viability.
Phase I demonstrated that nanoparticles can be functionalized to enter plant cells and bind specific bioactive
flavonoid metabolites before being extruded, and these metabolites recovered, all without loss of plant cell
viability. Phase II now aims to demonstrate that a similar, but more selective, approach can be used to harvest
higher value pharmaceuticals from plant cells (i.e. proof of application). The most valuable types of metabolite
currently produced from plants include isoflavones, alkaloids and monoclonal antibodies (the latter from
transgenic plants). Phase II aims to show that each of these types of product can be harvested from plant cells
by their selective binding to nanoparticles on which specific oligopeptides have been conjugated. Each product
example is relevant to anti-cancer therapeutics. The first is the phytoestrogen, liquiritigenin, which is a selective
agonist of the estrogen receptor (ER)beta that should reduce risk of breast cancer post-menopause. This
flavanone will be harvested from overproducing mutant cultures of licorice root by selective binding to the
ERbeta ligand-binding oligopeptide conjugated to nanoparticles. The second example is to nanoharvest the
chemotherapeutic vinca alkaloids (currently extracted from intact plant material by Eli Lilly) from overproducing
mutant cultures of Catharanthus roseus. These alkaloids will be harvested by affinity to nanoparticles bearing
oligopeptides representing their binding sites on human tubulin. These two examples are natural metabolites,
but the most commercially important application of this technology may be to harvest foreign polypeptides, i.e.
“biologics”, such as antibodies, from transgenic plant cells. Here the example will be the harvesting from
transgenic tobacco cell cultures of a monoclonal antibody (mAbH10) directed against tumor cells. Selective
binding will be achieved using nanoparticles in which an oligopeptide mimicking the antibody-binding site on
the antigen has been conjugated to the surface. In all of these examples the objective is to show that
nanoparticles can repeatedly remove the desired commercial product without loss of plant cell viability. This
will reduce “down time” and could also reduce “response time”, for example the urgent requirement for
antibodies or vaccines in an outbreak of disease. In addition, separation of product by affinity to an
oligopeptide binding site means that the harvested products will be simultaneously semi-purified. Phase II
should demonstrate proof of application for the nanoparticle harvesting technology as applied to high value
anti-cancer pharmaceuticals. The applicants will then move toward commercialization in partnership with
identified pharmaceutical and biotechnology companies in the US and Europe (see Commercialization Plan).
摘要:植物细胞培养物正在成为具有商业价值的药物来源,特别是
那些对于经济的化学合成来说过于复杂的物质,例如德国的 Phyton Biotech 公司就拥有这种技术。
通过在无菌植物细胞中生成紫杉醇用于紫杉醇生产,取得了巨大的商业成功
然而,这些系统的效率受到生长缓慢的植物活力丧失的限制。
与传统提取程序相关的细胞本文的目标是开发一个系统
允许重复收获植物细胞以生产高价值的药品,而不会失去活力。
第一阶段证明纳米颗粒可以功能化进入植物细胞并结合特定的生物活性
挤压前的类黄酮代谢物,以及这些代谢物的回收,均不损失植物细胞
第二阶段现在的目标是证明可以使用类似但更具选择性的方法来收获。
来自植物细胞的更高价值的药物(即应用证明)最有价值的代谢物类型。
目前从植物中生产的物质包括异黄酮、生物碱和单克隆抗体(后者来自
第二阶段的目的是证明这些类型的产品都可以从植物细胞中收获。
通过它们选择性地结合特定寡肽的纳米颗粒。
例子与抗癌疗法有关。第一个是植物雌激素甘草素,它是一种选择性的激素。
雌激素受体 (ER)β 激动剂,可降低绝经后患乳腺癌的风险。
黄烷酮将从甘草根的过量生产突变体培养物中通过选择性结合来收获
第二个例子是纳米收获 ERbeta 配体结合寡肽。
化疗用长春花生物碱(目前由礼来公司从完整的植物材料中提取)来自过度生产
这些生物碱将通过与带有纳米颗粒的亲和力来收获。
代表其在人微管蛋白上的结合位点的寡肽这两个例子是天然代谢物,
但该技术最重要的商业应用可能是收获外源多肽,即
“生物制品”,例如来自转基因植物细胞的抗体。
针对肿瘤细胞的单克隆抗体(mAbH10)的转基因烟草细胞培养物。
结合将使用纳米颗粒来实现,其中寡肽模仿抗体结合位点
在所有这些例子中,目的是表明抗原已缀合至表面。
纳米颗粒可以反复去除所需的商业产品,而不损失植物细胞的活力。
将减少“停机时间”,也可以减少“响应时间”,例如紧急需求
疾病爆发时的抗体或疫苗此外,通过与某种物质的亲和力来分离产品。
寡肽结合位点意味着收获的产品将同时进行第二阶段的半纯化。
应证明纳米颗粒收获技术应用于高价值
然后,申请人将与合作伙伴进行抗癌药物的商业化。
确定了美国和欧洲的制药和生物技术公司(参见商业化计划)。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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JOHN M. LITTLETON其他文献
JOHN M. LITTLETON的其他文献
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{{ truncateString('JOHN M. LITTLETON', 18)}}的其他基金
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- 资助金额:
$ 53.03万 - 项目类别:
Mimicking synuclein toxicity in plant cells to identify novel neuroprotective leads
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Harvesting specific plant metabolites from hairy root cultures using magnetized n
使用磁化n从毛状根培养物中收获特定的植物代谢物
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